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Finding the Fourth Proportional to 120,753.36, 180,894.42 and 79,074

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Solution

The fourth proportional to 120,753.36, 180,894.42 and 79,074 is: 118,456.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    120,753.36 : 180,894.42 = 79,074 : x
  2. Step 2: Convert to fraction form
    120,753.36/180,894.42 = 79,074/x
  3. Step 3: Cross multiply
    120,753.36x = 180,894.42 × 79,074
  4. Step 4: Simplify right side
    120,753.36x = 14,304,045,367.08
  5. Step 5: Solve for x
    x = 14,304,045,367.08/120,753.36
  6. Step 6: Final answer
    x = 118,456.71

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.